Engine Fan Noise; Power Steering Fluid - Cadillac Escalade 2003 Owner's Manual

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5. Then replace the pressure cap. Be sure the

pressure cap is hand-tight and fully seated.

Engine Fan Noise

Your vehicle has a clutched engine cooling fan. When

the clutch is engaged, the fan spins faster to provide

more air to cool the engine. In most everyday driving

conditions, the fan is spinning slower and the clutch is

not fully engaged. This improves fuel economy and

reduces fan noise. Under heavy vehicle loading, trailer

towing and/or high outside temperatures, the fan

speed increases as the clutch more fully engages. So

you may hear an increase in fan noise.

This is normal and should not be mistaken as the

transmission slipping or making extra shifts. It is merely

the cooling system functioning properly. The fan will

slow down when additional cooling is not required and

the clutch disengages.

You may also hear this fan noise when you start the

engine. It will go away as the fan clutch partially

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